Method for molding shape of bristles of mascara brush for eyelashes, mold used in the method, and mascara brush molded by the method

ABSTRACT

A mascara brush for eyelash makeup includes two strands of iron cores and brush bristles having dorsal portions, which are formed by nylon bristles put on the iron cores and twisted spirally several times so as to be formed radially on the basis of the iron cores, the brush bristles having the dorsal portions having the same length on the basis of the iron cores.

CROSS REFERENCE TO RELATED APPLICATIONS AND CLAIM OF PRIORITY

This patent application is a divisional application of application Ser.No. 13/989,055, filed May 22, 2013, which is National Phase applicationunder 35 U.S.C. §371 of International Application No. PCT/KR2011/004679,filed Jun. 28, 2011, which claims priority to Korean Patent ApplicationNo. 10-2010-0129933 filed Dec. 17, 2010, to entire contents of which areincorporated herein by reference.

BACKGROUND

1. Technical Field

The present invention relates to a method for molding a shape ofbristles of a mascara brush for eyelashes, a mold used in the method,and a mascara brush molded by the method. Two strands of iron cores aretwisted and brush bristles respectively having dorsal portions areradially spread between the twisted iron cores through a post-process soas to form a mascara brush, wherein the dorsal portions are formed bythe brush bristles of the same length on the basis of the iron coreswithout difference in the length of the brush bristles, so that amascara solution contained in the dorsal portion does not run down whenbeing applied to eyelashes, and the mascara provides more volume and abeautiful eyelash make-up by patterning out when a sufficient amount ofthe mascara solution is applied.

2. Description of the Related Art

Eyes have a great influence on a person's appearances and impressions.So, many women make a lot of efforts to make the optimum appearance andimpression through eye makeup, and one of such efforts is eyelashmakeup.

Eyelash makeup out of the eye makeup methods plays an important role toexpress eyes beautifully, and people use mascara brushes for eyelashmakeup.

As mascara brushes used for eyelash makeup, there are rubber brushes andbrushes having nylon bristles (brushes) spirally twisted between twostrands of iron cores several times so as to have a circular section.

Because such mascara brushes have their own features and merits, userscan select them according to the users' tastes and use purposes, buttill now, mascara brushes manufactured using the nylon bristles arepopular.

As described above, the mascara brush using the nylon bristles ismanufactured by the steps of putting nylon bristles (brushes) betweentwo strands of iron cores and spirally twisting them several times, andthe manufactured mascara brush has a circular shape in horizontalsection.

When the user applies eyelash makeup using the mascara brush, the userstains a mascara solution contained in a mascara container on themascara brush and brushes the eyelashes with the mascara brush so thatthe mascara solution is applied to the eyelashes and the eyelashes arecurled upwardly by the applied mascara.

As described above, the conventional mascara brush has several problemsin that the mascara solution is not applied to the eyelashes uniformlyand generates bubbles or is agglomerated because the mascara brushformed in a circular shape applies the mascara solution to the eyelashesin a state where the mascara solution is not smoothly permeated betweenthe eyelashes.

In the case that the mascara solution generates bubbles or isagglomerated, the eyelashes are not curled upwardly and the appliedmascara solution makes the eyelashes dirty, and hence, it may cause afeeling of aversion. In the case that the applied mascara solution isagglomerated, mascara applied to the eyelashes may drop from theeyelashes and get in eyes by wind, so that it may obstruct the user'sfield of vision or may cause skin troubles by dropping on the skinaround the eyes.

In order to overcome the problems of the conventional mascara brush,mascara brushes of various shapes have been manufactured in such a wayas to correspond with eyelashes.

In other words, the manufactured mascara brush has dorsal portionsformed on the mascara brush through a post-process in such a manner thatthe dorsal portions first get in contact with the eyelashes when theuser applies eyelash makeup using the mascara brush, and hence, theabove-mentioned problem can be solved.

The dorsal portions are formed in such a way that the nylon bristle hasa triangular shape or a serrated shape in horizontal cross section, andmay be formed by various methods.

As described above, the mascara brush bristles made of nylon and havinga circular shape are cut to have the dorsal portions of the triangularshape or the serrated shape.

Korean Utility Model Registration No. 20-0239112 discloses a “Mascarabrush for eyelash makeup” in which brush bristles are formed by cutting.

In Korean Utility Model Registration No. 20-0239112, the mascara brushcan apply a mascara solution to eyelashes uniformly withoutagglomeration and curl up the eyelashes easily because the brushbristles smoothly move through the eyelashes. However, because themascara brush of the circular shape is cut into various shapes throughthe post-process, the brush bristles located at a position where thedorsal portions are formed are deteriorated in density, and hence, themascara solution stained on the dorsal portions are easily separated andrun down even by a small shock, it is difficult to apply the mascarasolution with volume due to the lower density of the brush bristles atend portions of the dorsal portions, and it is also difficult to brusheyelashes evenly because the brush bristles of the dorsal portions arebent when the user brushes the eyelashes to which the mascara solutionwith viscosity is applied.

SUMMARY

Accordingly, the present invention has been made in an effort to solvethe above-mentioned problems occurring in the prior arts, and it is anobject of the present invention to provide a mascara brush for eyelashmakeup, a mold for molding the mascara brush, and a method for molding ashape of bristles of a mascara brush for eyelashes, which includes thesteps of: putting brush bristles in a dorsal portion molding hole of amold for molding dorsal portions, which are radially on the basis ofiron cores and enables a user to easily contact the brush to eyelasheswhen the user applies eyelash makeup; heating the mold in a moldingfurnace at heating temperature of 200° C. for 20 minutes so that thebrush bristles made of nylon are formed in a shape corresponding to thedorsal portion molding hole of the mold; drawing out the mold from themolding furnace and extracting the brush bristles from the dorsalportion molding hole; holding the brush bristles on a drying rack andannealing them at room temperature to thereby form the dorsal portionsformed radially, thereby preventing the mascara brush being bent whenthe user brushes eyelashes because the brush bristles having the dorsalportions have excellent rebound elasticity at their ends since thedorsal portions are not formed by cutting the brush bristles but theentire brush bristles have the same length uniformly to ends of thedorsal portions on the basis of the iron cores, storing a mascarasolution between the brush bristles in safety and preventing the mascarasolution from dropping down even though a shock is applied to themascara during eyelash makeup so as to prevent the mascara solution frombeing stained on clothes because the brush bristles having the dorsalportions have the same length and the dorsal portions have higherdensity, applying the mascara solution with volume and providing a thickand beautiful eyelash makeup because the mascara brush is filled withthe mascara solution of a sufficient amount between the brush bristles,and allowing a clean, neat, curved and beautiful eyelash makeup becausethe mascara brush has not only the dorsal portions with higher densityof brush bristles but also dorsal portions with lower density of brushbristles enabling the user to evenly spread the mascara solution appliedto the eyelashes by the dorsal portions with higher density.

To achieve the above objects, the present invention provides a method ofmolding a shape of mascara brush bristles for eyelash makeup including:a mascara preparing process of putting nylon bristles constituting brushbristles on two strands of iron cores and twisting them spirally severaltimes so as to spread in all directions on the basis of the iron coresso that the brush bristles have a circular section; a mascara seatingprocess of seating the brush bristles of the prepared mascara in adorsal portion molding hole of a mold; a dorsal portion molding processof putting the mold, in which the brush bristles are seated, into amolding furnace and heating the molding furnace so that the brushbristles of the mascara made of nylon are thermally transformed into aform corresponding to the dorsal portion molding hole of the mold tothereby mold dorsal portions; a mascara extracting process of drawingout the mold and extracting the mascara brush having the dorsal portionsby being thermally transformed in correspondence with the dorsal portionmolding hole after the mold is heated and the brush bristles having thedorsal portions 21 are completely molded; and a plastic forming processof holding the mascara extracted from the dorsal portion molding hole ofthe mold on a drying rack so as to plastic-form the dorsal portions ofthe brush bristles formed by thermal transformation through an annealingprocess at room temperature.

To achieve the above objects, the present invention provides a mold usedfor molding a shape of mascara brush bristles for eyelash makeupincluding: a dorsal portion molding hole enabling the dorsal portions ofthe brush bristles of the mascara, which are formed by nylon bristlesput on two strands of iron cores and twisted spirally several times soas to spread in all directions on the basis of the iron cores so thatthe brush bristles have a circular section, to be formed outwardly onthe basis of the iron cores.

To achieve the above objects, the present invention provides a mascarabrush for eyelash makeup including: two strands of iron cores; and brushbristles having dorsal portions, which are formed by nylon bristles puton the iron cores and twisted spirally several times so as to be formedradially on the basis of the iron cores, the brush bristles having thedorsal portions having the same length on the basis of the iron cores.

As described above, the mascara brush for eyelash makeup, the mold formolding the mascara brush, and the method for molding a shape ofbristles of a mascara brush for eyelashes according to the presentinvention enable the user to easily contact the brush to eyelashes whenthe user applies eyelash makeup. The method for molding a shape ofbristles of a mascara brush for eyelashes according to the presentinvention includes the steps of: putting brush bristles in a dorsalportion molding hole of a mold for molding dorsal portions, which areradially on the basis of iron cores; heating the mold in a moldingfurnace at heating temperature of 200° C. for 20 minutes so that thebrush bristles made of nylon are formed in a shape corresponding to thedorsal portion molding hole of the mold; drawing out the mold from themolding furnace and extracting the brush bristles from the dorsalportion molding hole; holding the brush bristles on a drying rack andannealing them at room temperature to thereby form the dorsal portionsformed radially, and the present invention provides the followingeffects.

First, the mascara brush according to the present invention can preventthe mascara brush being bent when the user brushes eyelashes because thebrush bristles having the dorsal portions have excellent reboundelasticity at their ends since the dorsal portions are not formed bycutting the brush bristles but the entire brush bristles have the samelength uniformly to ends of the dorsal portions on the basis of the ironcores.

Second, the mascara brush according to the present invention can store amascara solution between the brush bristles in safety and preventing themascara solution from dropping down even though a shock is applied tothe mascara during eyelash makeup so as to prevent the mascara solutionfrom being stained on clothes because the brush bristles having thedorsal portions have the same length and the dorsal portions have higherdensity.

Third, the mascara brush according to the present invention can applythe mascara solution with volume and providing a thick and beautifuleyelash makeup because the mascara brush is filled with the mascarasolution of a sufficient amount between the brush bristles.

Fourth the mascara brush according to the present invention can enablethe user to apply a clean, neat, curved and beautiful eyelash makeupbecause the mascara brush has not only the dorsal portions with higherdensity of brush bristles but also dorsal portions with lower density ofbrush bristles enabling the user to evenly spread the mascara solutionapplied to the eyelashes by the dorsal portions with higher density.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flow chart of a method of molding a shape of mascara brushbristles for eyelash makeup according to the present invention.

FIG. 2 is a view of a mold used in the method of molding a shape ofmascara brush bristles for eyelash makeup according to a preferredembodiment of the present invention.

FIG. 3 is a front view of FIG. 2.

FIG. 4 is a view showing a state where mascara brush bristles are seatedin a dorsal portion molding hole of the mold of FIG. 2.

FIG. 5 is a view of a mold used in the method of molding a shape ofmascara brush bristles for eyelash makeup according to another preferredembodiment of the present invention.

FIG. 6 is a plan view of FIG. 5.

FIG. 7 is a view showing a state where dorsal portions are formed on thebrush bristles by the mold of FIG. 2.

FIG. 8 is a view showing a state where dorsal portions are formed on thebrush bristles by the mold of FIG. 5.

DETAILED DESCRIPTION

A method of molding a shape of mascara brush bristles for eyelash makeupaccording to the present invention in order to achieve the above objectsincludes:

a mascara preparing process of putting nylon bristles constituting brushbristles 20 on two strands of iron cores 10, twisting them spirallyseveral times so as to spread in all directions on the basis of the ironcores 10 so that the brush bristles 20 have a circular section;

a mascara seating process of seating the brush bristles 20 of theprepared mascara 1 in a dorsal portion molding hole 110 of a mold 100;

a dorsal portion molding process of putting the mold 100, in which thebrush bristles 20 are seated, into a molding furnace with heat of 195°C. to 205° C. and heating the molding furnace for 17 minutes to 23minutes so that the brush bristles 20 of the mascara 1 made of nylon arethermally transformed into a form corresponding to the dorsal portionmolding hole 110 of the mold 100 to thereby mold dorsal portions 21;

a mascara extracting process of drawing out the mold 100 and extractingthe mascara brush having the dorsal portions 21 by being thermallytransformed in correspondence with the dorsal portion molding hole 110after the mold 100 is heated and the brush bristles 20 having the dorsalportions 21 are completely molded; and

a plastic forming process of holding the mascara extracted from thedorsal portion molding hole 110 of the mold 100 on a drying rack so asto plastic-form the dorsal portions 21 of the brush bristles 20 formedby thermal transformation through an annealing process at roomtemperature.

It is preferable that heating temperature of the molding furnace is 200°C. and a heating period of the mold 100 is 20 minutes.

The mold 100 used for molding the shape of the brush bristles of themascara 1 includes the dorsal portion molding hole 110 enabling thedorsal portions 21 of the brush bristles 20 of the mascara 1, which areformed by nylon bristles put on two strands of iron cores and twistedspirally several times so as to spread in all directions on the basis ofthe iron cores 10 so that the brush bristles 20 have a circular section,to be formed outwardly on the basis of the iron cores 10.

As described above, the mold 100 having the dorsal portion molding hole110 has different structures according to shapes and density of thedorsal portions 21.

In the case that the dorsal portions 21 are formed in a cross shape, themold 100 includes a lower mold 120 and an upper mold 130. The lower mold120 includes: molding apertures 121 having a width corresponding to adiameter of the circular brush bristles 20 and respectively havingarranging dorsal portion molding slots 122, each of which is formed inthe floor surface thereof and has a depth corresponding to a radius ofthe brush bristles 20 and a narrow width; and guide posts 123 formed atupper faces of both sides thereof for guiding the upper mold 130. Theupper mold 130 includes: guide holes 133 formed at both sides thereof towhich the guide posts 123 of the lower mold 120 are inserted;protrusions 131 corresponding to the molding apertures 121 of the lowermold 120; arranging dorsal portion molding slots 132 formed at thecenter corresponding to the arranging dorsal portion molding slots 122of the molding apertures 121; and bolt holes 134 formed corresponding tobolt holes 124 of the lower mold 120 for inserting assembly bolts 135thereinto. The dorsal portion molding hole 110 is formed in the crossshape when the lower mold 120 and the upper mold 130 are assembledtogether, and thereby, the brush bristles 20 are molded in such a way asto have the dorsal portions 21 respectively having the applying dorsalportions 21 a with higher density and the arranging dorsal portions 21b.

Arranging dorsal portions 21 b with lower density of the brush bristlesare formed by the arranging dorsal portion molding slots 122 and 132 ofthe lower mold 120 and the upper mold 130, and applying dorsal portions21 a with higher density of the brush bristles are formed between thelower mold 120 and the upper mold 130.

The mold 100 may include a radial dorsal portion molding hole 110according to another preferred embodiment of the present invention. Inthis embodiment, the mold 100 includes: an insertion hole 111 formed atthe center thereof in such a manner that iron cores 10 are insertedthereinto; radial molding grooves 112 formed on the basis of theinsertion hole 111 for molding the dorsal portions 21 radially; and endportions 113 of the radial molding grooves 112, each having a lengthcorresponding to a radius of the circular brush bristles 20 on the basisof the insertion hole 111 in which the iron cores 10 are inserted.

The mold 100 having the radial dorsal portion molding hole 110 includesinclined surfaces 114, which gradually lower toward the radial moldinggrooves 112 and are continuously repeated in a concavo-convex form, suchthat the brush bristles 20 can be easily inserted into the radialmolding grooves 112.

In the case of the brush bristles of the mascara manufactured by theabove molding method, the nylon bristles constituting the brush bristles20 are put on the two strands of the iron cores 10 and twisted spirallyseveral times, so that the dorsal portions 21 of the nylon bristles areformed radially on the basis of the iron cores 10, and the brushbristles 20 having the dorsal portions 21 have the same length on thebasis of the iron cores 10.

The dorsal portions 21 may include the applying dorsal portions 21 awith higher density of the brush bristles 20 and the arranging dorsalportions 21 b with lower density of the brush bristles 20, andalternatively, may have uniform density.

When the brush bristles 20 having the applying dorsal portions 21 a andthe arranging dorsal portions 21 b, as shown in FIGS. 2 and 3, in astate where the upper mold 130 is separated from the lower mold 120, thebrush bristles 20 of the mascara 1 are located in the molding hole 121of the lower mold 120 as shown in FIG. 3.

In the state where the brush bristles 20 of the mascara 1 are located inthe molding hole 121 of the lower mold 120, the upper mold 130 is joinedto the lower mold 120.

As described above, when the upper mold 130 is joined to the lower mold120, the protrusions 131 are inserted into the molding apertures 121 ofthe lower mold 120, and hence, the brush bristles 20 having the dorsalportions 21 are formed, and in this instance, the applying dorsalportions 21 a, which has higher density and good rebound elasticity andallow the user to easily apply a mascara solution to eyelashes, are in atemporarily molded state, and at the same time, the arranging dorsalportions 21 b are also in a temporarily molded state in the arrangingdorsal portion molding slots 122 and 132 respectively formed in thelower mold 120 and the upper mold 130 (See FIG. 4).

As described above, when the upper mold 130 and the lower mold 120 arejoined together, the assembly bolts 135 are fastened to the bolt holes124 of the lower mold 120 so as to keep the joined state.

In the above state, the mold 100 is inserted into a molding furnace,heated at heating temperature of 195° C. to 205° C. for 17 minutes to 23minutes, and then, drawn out from the molding furnace. The mascara 1 isextracted from the mold 100 drawn out from the molding furnace, andthen, annealed at room temperature, so that the brush bristles 20 havingthe dorsal portions 21, which have the applying dorsal portions 21 a andthe arranging dorsal portions 21 b, are manufactured as shown in FIG. 7.

In order to extract the brush bristles 20 having the dorsal portions 21,which have the applying dorsal portions 21 a and the arranging dorsalportions 21 b, the assembly bolts 135 are released, and then, the uppermold 130 is separated from the lower mold 120.

FIGS. 5 and 6 illustrate a mold according to another preferredembodiment of the present invention. In this embodiment, the dorsalportions 21 are radially formed on the basis of the iron cores 10, andwhen the brush bristles 20 are pushed into the radial molding grooves112 of the dorsal portion molding hole 110 in a state where the ironcores 10 coincide with the insertion hole 111 of the center, the brushbristles 20 are guided to the inclined surfaces 114 so that the brushbristles 20 are inserted into the molding hole 110 neatly.

The inclined surfaces 114 have a form that ridges and valleys arecontinuously repeated because a portion where the dorsal portion moldinghole 110 is located is lower and a point where the dorsal portionmolding holes 110 are equally divided is higher.

The mold 100, in which the brush bristles 20 are inserted into thedorsal portion molding hole 110 in such a way that the dorsal portions21 are temporarily molded, is inserted into a molding furnace withheating temperature of 195° C. to 205° C., heated for 17 minutes to 23minutes, and then, drawn out from the molding furnace. The mascara 1 isextracted from the mold 100 drawn out from the molding furnace, andthen, annealed at room temperature, so that the brush bristles 20 havingthe dorsal portions 21 are manufactured as shown in FIG. 8.

The dorsal portions 21 of the brush bristles 20 may be formed in astraight form or in a three-way form.

What is claimed is:
 1. A mascara brush for eyelash makeup comprising:two strands of iron cores; and brush bristles having dorsal portions,which are formed by nylon bristles put on the iron cores and twistedspirally several times so as to be formed radially on the basis of theiron cores, the brush bristles having the dorsal portions having thesame length on the basis of the iron cores.
 2. The mascara brushaccording to claim 1, wherein the dorsal portions comprise applyingdorsal portions and arranging dorsal portions with lower density thanthe applying dorsal portions.
 3. A mascara brush molded by a processcomprising: preparing a mascara by putting nylon bristles constitutingbrush bristles on two strands of iron cores and twisting them spirallyseveral times so as to spread in all directions on the basis of the ironcores so that the brush bristles have a circular section; seating thebrush bristles of the prepared mascara in a dorsal portion molding holeof a mold; putting the mold, in which the brush bristles are seated,into a molding furnace and heating the molding furnace so that the brushbristles of the mascara made of nylon are thermally transformed into aform corresponding to the dorsal portion molding hole of the mold tothereby mold dorsal portions; drawing out the mold and extracting themascara brush having the dorsal portions by being thermally transformedin correspondence with the dorsal portion molding hole after the mold isheated and the brush bristles having the dorsal portions are completelymolded; and drying the mascara extracted from the dorsal portion moldinghole of the mold at room temperature so as to plastic-form the dorsalportions of the brush bristles formed by thermal transformation throughan annealing process.
 4. The mascara brush according to claim 3, whereinthe molding furnace is heated at temperature of 195° C. to 205° C. 5.The mascara brush according to claim 3, wherein the mold heated in themolding furnace is heated for 17 minutes to 23 minutes.